Casio Computer Co., Ltd.

Casio Computerco., Ltd.

Tsutomu Terazaki

Takahiro Tomida

Toshihiro Takahashi

Ryo Okumura

Kazuho Kyou

Osamu Nakamura

Hiroshi Iwamiya

Keishi Takeyama

Makoto Nakagawa

Sadao Nagashima

Tadao Yamamoto

Masatoshi Nomura

Yoshiaki Nakamura

Masaharu Shioya

Shogo Hashimoto

Yuji Tabata

Junichi Hato

Tetsushi Ishikawa

Motoki Endo

A wireless communication apparatus includes a wireless communicator configured to perform wireless communication with another wireless communication apparatus, and a processor. The processor controls the wireless communicator to transmit to the other wireless communication apparatus prescribed information while incrementally changing transmission power by a prescribed degree until a change occurs in a signal reception state of a connection request from the other wireless communication apparatus, and starts transmission of the prescribed information to the other wireless communication apparatus during a next communication onwards at a transmission power based on a transmission power occurring when the change occurs in the signal reception state of the connection request.

Wireless communication apparatus, electronic timepiece, transmission power control method, and storage medium

A wireless communication apparatus includes (i) a wireless communicator capable of broadcasting an extended advertising packet having a large transmittable capacity and a compatible advertising packet having a transmittable capacity smaller than the extended advertising packet, and (ii) a processor. The wireless communicator periodically broadcasts the extended advertising packet based on a command from the processor. The processor sets offset information for acquiring of a time at which the extended advertising packet is receivable in an offset notification packet that is the compatible advertising packet, and broadcasts the offset notification packet via the wireless communicator. The offset information is set based on a transmission timing of the offset notification packet and a transmission timing of the extended advertising packet.

Wireless communication apparatus, wireless communication method, and storage medium

An electronic terminal capable of using a function of payment includes a wearing detector, a communicator, and a processor. The wearing detector detects whether the electronic terminal is worn by a user. The communicator communicates with a wireless communication apparatus via near field communication. The processor changes, based on information that is obtained by the wearing detector and the communicator, whether to enable or disable use of the function of payment.

Electronic terminal, electronic watch, security setting method, and recording medium

Communication device, scanner terminal, communication system, communication method, and storage medium

A wireless communication apparatus includes a wireless communicator and a controller. The wireless communicator is configured to wirelessly communicate with other wireless communication apparatuses. The controller is configured to control the wireless communicator to broadcast transmission information, and when the wireless communicator receives a request corresponding on the transmission information from at least one of the other wireless communication apparatuses having received the transmission information during the broadcasting of the transmission information, control the wireless communicator to change transmission power of the transmission information to the other wireless communication apparatuses.

Wireless communication apparatus, wireless communication method, and recording medium

According to an aspect of the present invention, a communication device includes a communicator for communication with other device in a network to which the communication device belongs and a processor for generating frames to be communicated. The processor generates second identification information different from first identification information which is identification information unique to the communication device based on the first identification information. Further, the processor generates a frame including the second identification information.

Communication device, electronic timepiece, communication method and recording medium

A radio communication apparatus performing radio communication based on either role, a master or a slave, includes a role change receiver receiving a role change request from a slave to a master when the radio communication apparatus has a role of slave and has established connection to another radio communication apparatus operating as a master, and a receiver awaiting identification information transmitted by the other radio communication apparatus by receiving multiple channels including a given channel in a given pattern when the role change receiver receives the change request. The receiver receives the multiple channels in the given pattern such that the time or number of times of awaiting the identification information on the given channel is longer or higher than a given comparison criterion for when the role change receiver does not receive the change request.

Radio communication apparatus and radio communication method

A communication apparatus includes a communication unit and a controller. The controller determines, according to a first reference of received signal strength in one communication apparatus which is either an external communication apparatus or the communication apparatus, a transmitted signal strength for a transmission radio wave from the other communication apparatus as a first reference of transmitted signal strength. The controller determines a second reference of transmitted signal strength between the first reference of transmitted signal strength and a maximum strength of transmitted signal strength from the other communication apparatus. When a predetermined condition is satisfied, the controller obtains a received signal strength of the one communication apparatus for the transmission radio wave in the second reference of transmitted signal strength and determines a transmitted signal strength of a transmission radio wave from the other communication apparatus according to the received signal strength.

Communication apparatus and communication control method

According to an aspect of the present invention, a device includes a transmitter and receiver that transmits and receives communication packets to and from other device, and a processor. The processor receives a packet containing first information indicating a structure type of data from the other device via the transmitter and receiver and communicates data corresponding to the first information with the other device via the transmitter and receiver.

Communication device, communication method, and storage medium

A radio communication apparatus performing radio communication based on either role, a master or a slave, includes: a role change receiver receiving a role change request from a master to a slave when the radio communication apparatus has a role of master and has established connection to another radio communication apparatus operating as a slave; and an identification information transmitter transmitting identification information to the other radio communication apparatus on a given channel at shorter time intervals when the role change receiver receives the change request than a given comparison criterion for when the role change receiver does not receive the change request.

According to an aspect of the present invention, a device capable of wireless communication includes a communicator configured to transmit and receive communication packets to and from other device, a memory configured to store one or more kinds of setting information, and a processor configured to determine whether or not at least one of the one or more kinds of setting information has been changed after the last communication with the other device, generate discrimination information indicating whether or not each of the one or more kinds of setting information has been changed, and control communication with the other device based on the discrimination information.

According to an aspect of the present invention, a device capable of wireless communication includes a counter for counting current time, and a processor for setting a communication mode of the device to one of a notification mode in which the device sends a first notification signal for informing of its existence and a detection mode in which the device detects a second notification signal sent from other device. In the case that the processor changes the communication mode of the device from the notification mode to the detection mode and the second notification signal received in the detection mode includes first time information, the processor corrects time of the counter based on the first time information.

Communication device, electronic timepiece, time correcting method and recording medium

According to an aspect of the present invention, a device for generating frames for communication according to a specific communication protocol is provided. The communication protocol defines a plurality of kinds of frame formats and a beacon frame format defined by the communication protocol specifies a plurality of fields to be included in a beacon frame. The device generates a frame based on a frame format defined by the communication protocol. The device generates a beacon frame so that at least one of the plurality of fields specified by the beacon frame format defined by the communication protocol is omitted.

Device, system, method and recording medium for generating or processing communication frame

According to an aspect of the present invention, a device for communication according to a specific communication protocol includes a processor for generating a connection request frame for requesting a connection to other device based on the communication protocol. The connection request frame includes a predetermined field. The processor initiates data communication at predetermined timing in a given time interval in the case of setting the predetermined field of the connection request frame to a predetermined value and receiving a connection assignment frame for accepting the connection request from the other device.

Communication device, communication method and recording medium

According to an aspect of the present invention, a device for communication according to a specific communication protocol is provided. The communication device includes a processor for generating and processing frames based on frame formats defined by the communication protocol. The processor generates a beacon frame so that information on a collision avoidance scheme supported by the device of a plurality kinds of information specified based on the communication protocol is omitted. Further, the processor processes a connection request frame transmitted from other device to extract information on a collision avoidance scheme supported by the other device, and controls communication with the other device based on comparison of the extracted information on the collision avoidance scheme with the information on the collision avoidance scheme supported by the device.

Growing community of inventors

Saitama, Japan

Tsutomu Terazaki